Process of sealing containers



Nov. 5, 1935, E BLACK Er AL 2,019,841

PROCESS OF SEALING CONTAINERS Filed June 8, 1934 IrvirgiKBZdC/s; Henry B Silver Patented Nov. 5, 1935 UNITED STATES PATENT OFFICE Irving E. Black, Frederick J. Hoffer, and Henry B. Silver, Brooklyn, N. Y.

Application June 8, 1934, Serial No. 729,690

6 Claims.

The present invention relates more particularly to that type of container in which a removable closure is employed. It is essential or in many cases highly desirable that the joint between the closure and the container be initially and effectively sealed, the sealing, however, being of a character that will permit it being readily ruptured, so that the closure can be removed.

It is the object of the present invention to provide a method or process that will secure a peculiarly effective seal, and is quickly and easily applied to the container, so that a large number of containers can be thus treated in rapid succession.

In the accompanying drawing:

Figure 1 is a vertical sectional view, somewhat schematic in character, illustrating a means by which the process or method can be carried out.

Figure 2 is a plan view illustrating the method by which the sealing action is effected.

For a detail disclosure of the apparatus that may be employed for the purpose, reference is had to applicants co-pending application, Serial No. 705,434, filed January 5, 1934. It is believed, however, that the disclosure in the accompanying drawing is sufficient to illustrate the method or process. As therein shown a bottle 3 provided with the usual neck 4 having an opening for the discharge of the contents, is provided with a closure 5 for said opening, thus producing a joint, indicated in dotted lines at 6.

In order to seal this joint a plastic ribbon is preformed and is ejected immediately on its formation against the neck and closure over the joint 6. This ribbon then is carried around the neck, as will be clear by reference to Figure 2.

To perform this operation there is shown a reservoir 1 from which leads a conduit 8 to a pump chamber 9, the piston I of which is ro- 'tatable and is operated by a suitable shaft II.

From this pump a discharge conduit l2 leads to a nozzle 13, the discharge orifice IA of which creates the ribbon directly at the desired point of application. In the present structure the nozzle is rotated by a sprocket chain l operating on a sprocket wheel l6 that is connected with the nozzle mounting. The nozzle is thus caused to revolve about the neck of the bottle and consequently as the ribbon is forcibly ejected it will be applied with force against the neck and closure over the joint continuously until a complete ring has been made.

It has been found that this process or method produces a most effective seal over the joint and yet one which can be readily removed by the user of the bottle. The application of the sealing material is rapid so that the substance remains I plastic until the application has been properly effected, and as the method is quick in action, a large number of the containers or bottles can be treated in rapid succession.

It will be understood that insofar as the method is concerned, it is immaterial whether the bottle 0 or the nozzle is the rotated member.

What we claim, is:

1. The process of sealing containers having closures which consists in forcibly ejecting a wide and thin band of plastic sealing material against 10 the container and over the joint between the same and the closure and causing the projected band to travel around the container.

2. The process of sealing containers having closures which consists in continuously creating a substantially flat ribbon of plastic sealing material and as it is created projecting the same forcibly over the joint between the container and its closure.

3. The process of sealing the joints between containers and their closures which consists in pre-forming from a mass of plastic material a ribbon or band of suflicient width to transversely extend across the joint and while in its plastic form and as it is formed projecting it forcibly so against and over the joint between the container and its closure and causing the ribbon to be continuously so applied along and over the entire joint.

4. The process of sealing the joints between containers and their closures which consists in pre-forming under pressure a plastic band of sealing material wide enough to cover the joint and immediately applying said band by said pressure over said joint.

5. The process of sealing the joints between containers and their closures which consists in creating-and ejecting under force a plastic band of sufli-cient width to extend across said joint and engage the container and closure and at the same time placing in the path of said ejected pre-formed band the container, its closure and the joint, and causing the pre-formed band to be applied over said joint and upon the container and closure.

6. The process of sealing the joints between containers and their closures which consists in rotating a container and its closure on a substantially vertical axis, projecting in a substantially horizontal direction toward the container a preformed broad band of plastic sealing material and causing said band to cover the joint between the container and closure and be attached to the container and closure along the same.

IRVING E. BLACK. FREDERICK J. HOFFER. HENRY B. SILVER. 

